Tubular heat-interchanging apparatus.



W. J. STILL. TUBULAR HEAT INTERGHANGING APPARATUS.

APPLICATION FILED NOV. 11, 1913.

1,101,969, Patented June 30,1914.

3 SHEETS-SHEET 1.

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W. J. STILL. TUBULAR HEAT INTERGHANGING APPARATUS.

APPLICATION FILED NOV. 11, 1913.

Patented June 30, 1914.

3 SHEETS-SHEET 2.

W. J. STILL.

TUBULAR HEAT INTBRGHANGING APPARATUS.

APPLICATION FILED NOV. 11, 1913.

Patented June 30,1914.

3 $HEETSSHEET 3.

referred to tends to be maintained by fluid sate AE FFIQEQ WILLIAMJOSEPH STILL, OF WEST EALING,E1\TGLAND.

TUBULAR HEAT-HTTCHANGING APPARATUS Specification of Letters Patent.

Patented June 3, 1914b Application filed. November 11, 1913. Serial No.80033 5.

rected to the obtaining of effective fluid tight joints without thenecessity of making these permanent, so that access can be easily gainedto the interior of the apparatus when necessary, as for cleaningormspection.

Broadly, the jointing is obta1ned by arranging material of a flexlblecharacter in contact with the edges of gills or flanges for example insuch a manner that the contact\ pressure. I

In the accompanying draw1ngs,F1gure 1 1s a central vertical sectionofthe upper and lower parts of an oil cooler of; closed type accordingto the invention and Fig 2 1s a part horizontal section thereof. F1g. 31s, a sectional elevation, Fig.4 a part-sectional plan with coverremoved andFlg. 5 a part sectional end elevation of a modified form ofthe invention. Fig. 6 is a part sectional endi elevation showing a,modified construc tion.

In Figs. 1 and 2 the coollng llqllld. 1scaused to flow through aseriesof tubes o to which are secured a seriesof plates bforming gills, thesa-id,plates being punched with holes to receive the tubes and in whichthe tubes are fixed. The oil to be cooled is caused to flow into thespaces between these gills through holes 0 in each, the holes inonegill. 6 being staggered or d1splaced w1th respect to the holes in thegill 1) next 1n order, but in lieu of uniting the gills peripherally toform an outer confining wall or casing',. which would entail permanentjointlng, the, spaces are closed circumferent ally. b jacket of amaterial of a more or less yielda ing or, elastic nature, such asvulcamte sub-. stitutes, for example vulcanizedfiber, or, 1t'

may be,.ductile metal, that will form a close unit to the top wherejoint with the gills and prevent oil leaking orfshort-circuiting betweenthem. Such av jacket is shown as comprising a, slngle sheet d of theappropriate material of. a, d1 men sion equal in one direction to atleastthe overall distance between the uppermost and lowermost ills bandin the other direction to encircle t e gills with anappreciable overlap,the edge portions 6 at the joint being brought into intimate contactwith each other by suitable fastening means, as for example lacingmeans, a lace f in this case being shown as passed alternately aroundhooks or studs 9 secured to the sheet of ma terial. The eflect of thislacing is to cause thejacket to bind itself uniformly to the exof courseimportant that the contour of the gills in face view shall not presentany flat sides or edges with sharp angles but a curvilinear outline sothat the jacket'will wrap snugly around the gills.

In the particular example now being described, the tubes a permost andlowermost plates or gills b and "extend vertically through a top plateIt and a bottom plate 2' into which they are expanded. The bottom platet' is larger than the to plate it so that it can be secured, as by bo tsi to the flanged lower end portion 7' of an outer casing into positionover the top plate la a oint between the latter and the outer casingbeing made -by means of a stuffing box m, to allow for expansion andcontraction of the tubes. The oil entering the apparatus is separatedfrom the oil leaving the apparatus by means of a diaphragm n havingannular -.grooves 0 turned in its periphery which is adapted to takeinto an annular recess in the part j of the casing is and form apractically liquid tight jolnt therewith. This diaphragm is formed witha ring part {of the same external diameter as the gills I) and aroundwhich the flexible covering ma- ,terial or jacket (1 also terror edgesof the several gills, it being project beyond the uptightly extends soas to effectually close the joint between the ring and adjacentgill.Conveniently, the outlet "may be at r at one side of the j'df the outercasing in near the bottom plate 2' with the inlet 8 immediatel above the,idiaphragmn which separates te inlet and "outlet. In this way the oilis caused to ascend around the acket 0? of the cooling it. then entersthe spaces between the gills b and descends to the outlet, the diap ragmn being. perforated at 72 like the gills for outlet of.,oil. fAs the'oilis supplied to the cooler under pressure, the pressure of, the oiloutside the lower part min flexible jacket 03' will be greater than onthe inside thereof with the result that it will act to force thefiex'ble jacket tightly against the peripheries of the gills Z). Thewater or cooling medium inlet 15 is made centrally in a plate a whichmay serve as a base and is connected to the lower portion j of the outercasing by the bolts 6 hat secure the lower plate 2' of the cooling unitthereto. The outlet a for the water or equivalent may be similarlydisposed centrally in a cover e secured to the top plate h of thecooling unit.

It is not always necessary that the jacketing forming a joint with thetube gills should be wrapped around the same. For example, in the oilcooler shown in Figs. 3, a, and?) where the tubes at are arrangedhorizontally and the gills b disposed vertically, the cooling liquid iscaused to enter the upper compartment 1 of a fixed header 2 so as toflow through the upper set of tubes a to a rear movable header 3 andreturn by the lower set of tubes a to the lower compartment l of thefront header. outer casing 5 of the cooler is rectangular in shape,provided with a removable cover 6 and having an oil inlet 7 at one sidelocated at a height above the top of the gills b so that by providingflexible jointing side walls to such gills and fitting the outlet to oneof the said walls, the o1l can be con strained first to descend betweenthe casing 5 and the jointing wall, 8 and after passing below the latterto rise and flow uniformly between the gills. In the example, theflexible side walls 8, made of sheet lead, extend upwardly-to near thetop of the casing 5 where each is stifiened by a bar 9 of suitablemetal, the ends of such walls being detachably clamped together withadjacent edges of end walls 10 by metal corner clamps 11. lhe loweredges of the end walls 10 may be clamped to theheaders by metal bars 12.The oil outlet is shown as in the form of a ring or tube 13 clampedbetween the wall of the casing 5 and the adjacent lead wall 8 by means0' washers 13 13 and bolts 13. Uwing to the frictional resistanceofi'ered by the gills b to the flow of the oil, coupled with the factthat the outlet 13 is larger in area than the inlet 7, a difference inlevel exists at opposite sides of the walls 8, the head or pressure dueto this diderence serving, as in the previously described example, tokeep the flexible walls 8 in contact with the gills and at the same timeto insure a uniform upward movement of the liquid between the severalgills.

As will be obvious, a single wall of lead or the like bent over, asindicated in Fig. 6, may be employed to engage the gills?) at both sidesof the apparatus.

The movable header 3 is provided with feet 14 resting loosely upon thebottom of the casing 5 sothat relative movement can occur The Lionessbetween the complete nest of tubes a and the outer casing to compensatefor variations in temperature.

The tubular heat interchanging apparatus hereinbefore described insteadof being used for cooling a liquid, for example oil, as hereinbeforedescribed can be used for heating a liquid, in which case a heatingfluid would be passed through the tubes at.

What I claim is 1. A heat interchanger comprising a set of gilled tubesand sheet material of a flexible character held in contact with edges ofthe gills and forming a fluid tight joint therewith.

2. A heat interchanger comprising a set of gilled tubes and sheetmaterial of a flexible character held in contact with edges of the gillsin a detachable manner and forming a fluid tight joint therewith.

8. A heat interchanger comprising a set of gilled tubes and sheetmaterial of a flexible character arranged in contact with. the edges ofthe'gills so that fluid pressure can be caused to press the sheetmaterial against the gills to make joint therewith.

4. A heat interchanger comprising a set of gilled tubes, sheet materialof a flexible character arranged in contact with the edges of the gillsand means to fasten together the adjacent edges of pose specified.

5. A heat interchanger comprising a cas ing having a liquid inlet and anoutlet, a set of gilled tubes in such casing, and sheet materialarranged in contact with the edges of the gills the saidmaterial and thegills,form ing separated spaces through which the liquid must flow topass to the outlet.

6. A heat interchanger comprising a casing having an inlet and anoutlet, a set of gilled tubes in such casing, sheet material of aflexible character arranged in contact with the edges of the gills thesaid material and the gills, forming separated spaces through which theliquid must flow to pass to the outlet and means to fasten together theadjacent edges of said material.

7. A heat interchanger comprising a set of gilled tubes and a verticalwall of material of a flexible character arranged in contact with theedges of the '11s and past one end of which liquid must d w before itcan gain access to the spaces between tubes.

8. A heat interchanger, comprising. a nested set of horizontal tubeshaving rectangular gills thereon, a casi g containing such set of tubesand to one end of which the set is secured, and walls of a flexiblematerial adapted to gills under the pressure of a fluid and produce aseries of isolated stream paths between the gills.

said material, for the pur-- the gills of the engage the vertical edgesof the 9. A heat interchanger comprising a casrte ing having an inletside, a nested set opening at one side thereof and an outlet opening atthe opposite of gilled tubes in such casing, a Wall of material of aflexible character arranged in contact with the gills at the side of thenest of tubes adjacent to the liquid inlet, a similar Wall arranged incontact With the gills at the other side of the nest of tubes and havingan opening therein in register with the outlet opening of the casing anda duct between the opening in the Wall and the outlet opening,

the liquiclentering at the duct at the outlet,

Signed at U.

WILLIAM Witnesses:

A. H. Sam/Ens, H. D. JAfinsoN.

JOSEPH STILL.

Sf consulate, London, this 31st day of October, 1913

